JS Built-ins
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ObjectObject.setPrototypeOfintermediate

Object.setPrototypeOf() — basics

📖 Usage Example
// Set the prototype of an object
const animal = { breathe() { return true } }
const dog = {}
Object.setPrototypeOf(dog, animal)
dog.breathe()   // → true

Use Object.setPrototypeOf() to dynamically change an object's prototype, though creating objects with the correct prototype upfront is preferred.

Object.setPrototypeOf()

Object.setPrototypeOf(obj, proto) sets the prototype (i.e., the internal [[Prototype]] property) of a specified object to another object or null.

Challenge: Implement setProto(obj, proto) that sets the prototype of obj to proto.

💡 Hints (1)
  • • setPrototypeOf modifies the prototype chain at runtime